FOSDEM is a free event that offers open source communities a place to meet, share ideas and collaborate. It is renowned for being highly developer-oriented and brings together 5000+ geeks from all over the world.
You can find a schedule of python room here.
The FOSDEM 2015 will take place at ULB Campus Solbosch on Saturday 31 January and Sunday 1 February 2015 - Brussels.
Also no registration necessary for this event, according to the FOSDEM website.